Js
<script src="1.11.1.min.js"></script>
<link href="ddlcss.css" rel="stylesheet" />
<script>
$(function () {
$.ajax({
url: '<%=ResolveUrl("~/JqueryDropdown.aspx/GetEmployees") %>',
data: "{}",
dataType: "json",
type: "POST",
contentType: "application/json; charset=utf-8",
success: function (data) {
var ddlname = $("[id*=ddlname]");
ddlname.empty().append('<option selected="selected"
value="0">Please select</option>');
$.each(data.d, function () {
ddlname.append($("<option CssClass=" + "dropdown-menu" + "></option>").val(this['Value']).html(this['Text']));
});
},
error: function (response) {
alert(response.responseText);
},
failure: function (response) {
alert(response.responseText);
}
});
})
</script>
.aspx
<table width="100%">
<tr>
<td align="center">
<div class="container">
<div class="dropdown">
<asp:DropDownList runat="server" ID="ddlname" CssClass="dropdown-select">
</asp:DropDownList>
</div>
</div>
</td>
</tr>
</table>

